<template>
	<view>
		<my-search  :radius='20' @click="gotoSearch">搜索</my-search>
		<view class="scroll-view-container">
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
				<block v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			<!-- 右侧的滚动视图区域 -->
			<scroll-view class="right-scroll-view" scroll-y :style="{height: wh +'px'}" :scroll-top="scrollTop">
			  <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
					<!-- 二级分类标题 -->
		    	<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<view class="cate-lv3-list">
					  <!-- 三级分类 -->
					  <view class="cate-lv3-item"  v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
					  	  <!-- 图片 -->
					  	  <image :src="item3.cat_icon.replace('ugo-dev','hmugo-web')"></image>
					  	  <!-- 文本 -->
					  	  <text> {{item3.cat_name}} </text>
					  </view>
				  </view>
			  </view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	
	export default {
		mixins: [badgeMix],
		data() {
			return {
				//当前设备可用高度
				wh: 0,
				cateList: [],
				active: 0,
				cateLevel2: [],
				scrollTop: 0
			};
		},
		onLoad(){
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			
			this.getCateList()
			
		},
		methods:{
			//获取分类列表的数据
			async getCateList() {
				const {data: res } = await uni.$http.get('/api/public/v1/categories')
				// if (res.meta.staus !== 200) return uni.$showMsg()
				this.	cateList = res.message
				
				//为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			//点击响应（换）
		  activeChanged(i) {
		  	this.active = i
				
				//为二级分类重新赋值
				this.cateLevel2 = this.cateList[i].children
				
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
				
				
		  },
			//跳转到商品列表页面
			gotoGoodsList(item3) {
				uni.navigateTo({
				  url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>
  
<style lang="scss">
  .scroll-view-container {
    display: flex;
			
    .left-scroll-view {
      width: 120px;

      .left-scroll-view-item {
        background-color: #F7F7F7;
        line-height: 60px;
        text-align: center;
        font-size: 12px;

        &.active {
          background-color: #FFFFFF;
          position: relative;

          &::before {
            content: ' ';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #00aaff;
            position: absolute;
            top: 50%;
            left: 0;
            transform: translateY(-50%);
          }
        }
      }
    }
  }
	
  .cate-lv2-title {
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    padding: 15px 0;
  }

  .cate-lv3-list {
    display: flex;
    flex-wrap: wrap;

    .cate-lv3-item {
      width: 33.33%;
      display: flex;
      flex-direction: column;
      justify-content: center;//纵向居中
      align-items: center;//横向居中
      margin-bottom: 10px;//向下

      image {
        width: 60px;
        height: 60px;
      }

      text {
        font-size: 12px;
      }
    }
	}
	.right-scroll-view {
		background-color: #fff;
	}
</style>
